CN101090562A

CN101090562A - Method and device for sending user terminal position information in IP multi-medium subsystem

Info

Publication number: CN101090562A
Application number: CN200610087154.4A
Authority: CN
Inventors: 朱东铭; 徐杰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-06-15
Filing date: 2006-06-15
Publication date: 2007-12-19
Anticipated expiration: 2026-06-15
Also published as: EP2034681A4; CN101090562B; EP2034681A1; WO2007147357A1

Abstract

This invention discloses a method for transmitting user terminal position information in IP multimedia subsystem IMS including setting a position information obtaining module for getting position information of user terminals in the IMS domain to carry the position information of the user terminal in a session initiated protocol SIP signaling and transmit it to the IMS domain of the IP multimedia subsystem. This invention also discloses a device transferring user terminal position information in the IP IMS including at least a position information obtaining module used in getting current position information of call/registered users and sending it to the IMS network.

Description

In IP Multimedia System, transmit the method and the device of position information of user's terminal

Technical field

The present invention relates to IP Multimedia System (IMS) technology, refer to a kind of method and device that in IP Multimedia System, transmits position information of user's terminal especially.

Background technology

Evolve to the process of 3G network from the second generation (2G) network at wireless network, have the situation that has the two nets of 3G network and 2G network very long one period and deposit, under the two nets and the situation of depositing, the interoperability between two nets becomes a problem that requires study.

Network need be known the registration situation of user at two networks, when calling need be routed to the user, can select suitable network to continue like this.In addition, network needs grappling user's all-calls, can carry out assist control when making things convenient for the user to switch between two networks.

In order to address the above problem, third generation partner program (3GPP) and 3GPP2 normal structure have all proposed a kind of scheme of carrying out grappling control based on the IMS entity, detect registration, the session status of user respectively at two networks, and according to user's registration, route and the switching controls that session status carries out the user.Fig. 1 is the composition structural representation that prior art is carried out grappling control based on the IMS entity, and is as shown in Figure 1, at the newly-increased one group of functional entity in IMS territory and circuit switching (CS) territory, as follows:

Routing redirection functional entity (FE-C) is used for grappling control is called out in CS territory call re-direction to IMS territory;

CS territory adaption function entity (FE-B) is used to receive the CS territory calling that is rerouted to the IMS territory and transfers this CS territory calling to the IMS territory and calls out.Usually, routing redirection functional entity and CS territory adaption function entity can be arranged in the same entity, and this paper is collectively referred to as changed course/adaption function entity with this entity, and the interface of the two belongs to internal interface; Also can be two independent communities.

Controlled function entity (FE-D) is selected in the territory, and the various strategies such as login state, call state that are used in the IMS territory according to the user are made a strategic decision, and controlling call is routed to the selected territory of continuing;

Territory switching control function entity (FE-A) is used for calling out in the grappling of IMS territory, switches and carries out switching controls when taking place.

Visited Mobile Switching Center (VMSC) is by gsmSCF, and is mutual with FE-C, and in actual networking, gsmSCF and FE-C close and be located in the same entity usually, therefore, can think that VMSC and FE-C are directly mutual.

Under framework shown in Figure 1, Fig. 2 is the flow chart that the prior art dual mode subscriber terminal makes a call in the CS territory, as shown in Figure 2, may further comprise the steps:

Step 200: dual mode subscriber terminal (UE) sends call setup message in the CS territory to VMSC.

Carry called number in this call setup message and promptly call out opposite end number (Called PartyNumber), and calling subscriber position district cell ID (Cell ID).

After step 201:VMSC receives call setup message, trigger Initial Detection Point (IDP, InitialDetect Point) information and sending and give the routing redirection functional entity.

In cdma network, above-mentioned IDP message was called for and is asked that (this paper is collectively referred to as intelligent trigger message with IDP message and ORREQ message for ORREQ, OriginationRequest) message for the beginning.

According to mobile network's enhanced logic customized application (CAMEL) agreement, in IDP message, should carry Called Party Number, calling subscriber position district cell ID, do not use Cell ID in the prior art, so not shown among Fig. 2.

Step 202: the routing redirection functional entity distributes IMS territory routing number (IMRN), and the IMRN that distributes is carried in connections (CONNECT) message returns to VMSC, thereby call re-direction is arrived the IMS territory.

Step 203:VMSC is carried at IMRN and the Called Party Number that receives in the initial message (IAM), and sends to IMS territory MGCF (MGCF) entity.

In this step, VMSC has routed the call to IMS realm entry gateway.

Step 204:MGCF entity structure Session Initiation Protocol conversation request (INVITE) message, the IMRN and the Called Party Number that receive are carried in this INVITE, and send to inlet enquiry call conversation control function (I-CSCF) entity that the called subscriber belongs to the IMS territory.

At this moment, the IMRN that carries in the INVITE is used as called address.

After step 205:I-CSCF entity was received INVITE, detecting called address was IMRN, and this IMRN as a Public Service Identity (PSI, Public Service Identity), and is routed to CS adaption function entity with this INVITE.

Step 206:CS adaption function entity replaces dual mode subscriber terminal, the INVITE that receives is sent to service call conversation control function (S-CSCF) entity in the IMS territory, and CS adaption function entity replaces dual mode subscriber terminal to initiate a session request in the IMS territory.

Step 207:S-CSCF is triggered to basic service application server (AS) under the user with calling, and the INVITE that receives is sent to this basic service AS, carries out calling service control.

Step 208: basic service AS returns to S-CSCF with INVITE after finishing calling service control.

Step 209:S-CSCF will talk about and be routed to the callee side network, continues subsequent voice calls.

There is the beginning to exhale limit service if dual mode subscriber terminal is signatory, goes out to exhale, limit international long-distance, restriction national distance etc., and be that basic service AS by the IMS territory realizes the control of these business such as limiting all.So, basic service AS should have the ability to identify the type condition whether satisfied limit is exhaled of the current calling of user, just can carry out corresponding business control.

Whether the calling of judging dual mode subscriber terminal with basic service AS is that long-distance service is an example, basic service AS need know the positional information at the dual mode subscriber terminal place that makes a call, and the positional information that the called subscriber belonged to, when these two positions are in same zone, then judge it is not long-distance service; Otherwise, be judged to be long-distance service, at this moment, if the signatory restricted long-distance service of this dual mode subscriber terminal, basic service AS should refuse this calling so.

Yet, in step 205, positional information-Called Party the Number that only carries the called subscriber in the INVITE that basic service AS receives and belonged to, and the positional information at the dual mode subscriber terminal place that does not make a call, therefore, method according to the existing techniques in realizing calling, basic service AS can not judge whether to satisfy the signatory beginning from the dual mode subscriber terminal that makes a call in CS territory and exhale limit service, like this, follow-up calling in the IMS territory can not carried out according to the signatory situation of this dual mode subscriber terminal, no matter but whether current calling is that restriction call all continues to call out, perhaps call out control, thereby reduced quality of service control according to other strategy in the IMS territory.

From having the method that two net networks, realizes calling now, when dual mode subscriber terminal makes a call in the CS territory, the IMS territory can not obtain the positional information of this current position of dual mode subscriber terminal, make basic service AS can't obtain the positional information of the current position of calling subscriber, also just can not correctly subsequent voice calls rationally be controlled according to this calling subscriber's signatory situation.

In addition, when the user calls out in the territory is initiated in the IMS territory, in SIP:INVITE message, can carry access network information (P-Access-Network-Info) header field, carry user position district cell ID in this header field, this header field can be sent to the calling subscriber with message related to calls and belong to IMS territory and other trust domain.When INVITE is delivered to the P-CSCF of Calling Side, P-CSCF also can add visited network sign P-Visited-Network-ID header field in this INVITE, and this header field carries P-CSCF place network of network sign.

In the calling of in the IMS territory, initiating, though carry mobile subscriber's positional information in the P-Access-Network-Info header field, but, because this header field information is that user terminal self is filled in, can not obtain the trust of network, therefore, the positional information of not using this header field to carry is at present carried out the control of location-dependent services, exhales the control of limit service as the beginning.

In sum, method according to prior art, basic service AS in the IMS territory can not judge the user terminal that makes a call whether to satisfy the signatory beginning and exhale limit service, like this, subsequent voice calls in the IMS territory can not carried out according to the signatory situation of this user terminal, thereby has reduced quality of service control.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method of transmitting position information of user's terminal in IP Multimedia System, can obtain believable position information of user's terminal and pass to related entities in the IMS territory.

Another object of the present invention is to provide a kind of device that in IP Multimedia System, transmits position information of user's terminal, can obtain believable position information of user's terminal and pass to related entities in the IMS territory.

For achieving the above object, technical scheme of the present invention specifically is achieved in that

A kind of method of transmitting position information of user's terminal in IP Multimedia System IMS is provided for obtaining the position information acquisition module of position information of user's terminal in the IMS territory, this method comprises:

Described position information acquisition module is carried at the position information of user's terminal that obtains in the Session initiation Protocol SIP signaling, sends to IP Multimedia System IMS territory.

The described method of obtaining position information of user's terminal is: obtain from the signaling that receives, or obtain from location server or home subscriber server.

This method specifically may further comprise the steps:

A. described position acquisition module obtains user position information from the intelligent trigger message that receives;

B. the user position information that obtains is carried at and sends to the IMS territory in the SIP signaling.

Described position information acquisition module is arranged in the routing redirection functional entity, and described steps A specifically comprises:

A11. Visited Mobile Switching Center VMSC receives the setup requests that carries user position information from user terminal;

A12. this VMSC will receive user position information and send to described changed course functional entity, and the routing redirection functional entity is preserved this user position information;

A13. this routing redirection functional entity distributes the IP Multimedia System IMS territory routing number IMRN corresponding with this calling.

Described step B specifically comprises:

B11. described routing redirection functional entity returns to described VMSC with the IMRN that distributes, and described VMSC routes the call to IMS realm entry gateway according to the IMRN that receives;

B12. the IMRN that the utilization of described IMS realm entry gateway receives constructs Session initiation Protocol SIP conversation request message, and inquires that through the inlet in IMS territory conference call conversation control function I-CSCF entity routes to the CS adaption function entity in the IMS territory;

B13. the IMRN and the described routing redirection functional entity that receive of this CS adaption function entity utilization is mutual, obtains the user position information corresponding with this IMRN;

B14. this CS adaption function entity is carried at the user position information that obtains in this SIP conversation request message and makes a call.

Described position information acquisition module is arranged in the CS adaption function entity, and described steps A specifically comprises:

A21.VMSC receives the setup requests that carries user position information from user terminal;

A22. this VMSC sends to the changed course functional entity with the user position information that receives, and the routing redirection functional entity sends to CS adaption function entity with the user position information that receives, and request distributes IMRN;

A23. this CS adaption function entity is preserved and is received user position information, and corresponding IMRN is called out in distribution with this this.

Described step B specifically comprises:

B21. described CS adaption function entity sends to described VMSC with the IMRN that distributes through route changed course functional entity, and described VMSC routes the call to IMS realm entry gateway according to the IMRN that receives;

B22. the IMRN that the utilization of described IMS realm entry gateway receives constructs the SIP conversation request message, and routes to described CS adaption function entity through the inlet I-CSCF in IMS territory entity;

B23. described CS adaption function entity is preserved self, the user position information corresponding with the IMRN that receives is carried in the described SIP conversation request message and makes a call.

Described position information acquisition module is arranged among the MGCF MGCF of IMS territory, and described steps A specifically comprises:

A31. after described MGCF receives setup requests from user terminal, with the user position district cell ID that carries in this call setup request message as user position information; Perhaps from location server or home subscriber server, obtain the positional information of this user terminal, and as user position information.

This method specifically may further comprise the steps:

A. after described position information acquisition module receives SIP session/register requirement, to the positional information of the user terminal of location server or HSS request SIP session/registration;

B. the positional information with the user terminal that obtains is carried in this SIP session/register requirement, sends to the next entity in the IMS territory.

This method also comprises:

Application server AS in the described IMS territory is carried out business control according to the user position information that receives.

Described business is exhaled limit service for the beginning, or the roaming limit service, or other business.

Described user position information is a user position district cell ID.

Described user position information is carried in the P-Access-Network-Info header field or other header field of described SIP session/login request message.

In the existing P-Visited-Network-ID header field or other header field of described SIP conversation request message, further carry:

CS territory originating call sign is used for identifying call letters and originates from the CS territory;

Or the credibility of positional information sign, whether be used for identifying calling subscriber's present position-region cell ID that described SIP conversation request message carries credible.

Described routing redirection functional entity and CS adaption function entity are independent community, or are arranged in the same entity also respectively as two functional modules.

A kind of device that in IP Multimedia System IMS, transmits position information of user's terminal, this device comprises at least: position information acquisition module, this position information acquisition module receives position information of user's terminal, and this position information of user's terminal is carried in the Session initiation Protocol SIP signaling, send to IP Multimedia System IMS network by the existing SIP signaling interface module in this device.

Described device is the routing redirection functional entity, and described position information acquisition module is arranged on the routing redirection functional entity;

Perhaps, described device is the adaptive entity of circuit domain CS, and described position information acquisition module is arranged in the adaptive entity of CS;

Perhaps, described device is a changed course/adaption function entity, and described position information acquisition module is arranged in changed course/adaption function entity;

Perhaps, described device be in the IMS territory with registration or call out relevant entity, described position information acquisition module is arranged in the entity relevant with registration or calling in the IMS territory;

Perhaps, described device is an independent community.

Entity relevant with registration or calling in the described IMS territory comprises: application server or MGCF or P-CSCF.

As seen from the above technical solution, among the present invention, in the IMS territory, be provided for obtaining the position information acquisition module of position information of user's terminal, this position information acquisition module is carried at the position information of user's terminal that obtains in the Session initiation Protocol SIP signaling, send to IP Multimedia System IMS territory, realized obtaining believable position information of user's terminal and passed to related entities in the IMS territory.

Further, the present invention passes to the IMS territory by the positional information with caller/registered user, has realized the follow-up signatory situation according to this user terminal of IMS, to rationally controlling in IMS territory subsequent voice calls, has improved quality of service control.

Description of drawings

Fig. 1 is prior art is carried out grappling control based on the IMS entity a composition structural representation;

Fig. 2 is the flow chart that the prior art dual mode subscriber terminal makes a call in the CS territory;

Fig. 3 is the flow chart of the inventive method;

Fig. 4 is the flow chart of the embodiment of the invention one;

Fig. 5 is the flow chart of the embodiment of the invention two.

Embodiment

Core concept of the present invention is: the position information acquisition module that is provided for obtaining position information of user's terminal in the IMS territory, this position information acquisition module is carried at the position information of user's terminal that obtains in the Session initiation Protocol SIP signaling, sends to IP Multimedia System IMS territory.

For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing preferred embodiment that develops simultaneously, the present invention is described in more detail.

Fig. 3 is the flow chart of the inventive method, may further comprise the steps:

Step 300: the position information acquisition module that in the IMS territory, is provided for obtaining position information of user's terminal.

This position information acquisition module can be arranged in the routing redirection functional entity or the adaptive entity of CS in or in changed course/adaption function entity or the IMS territory with registration or call out among relevant entity such as the application server/MGCF/P-CSCF etc. or be an independent community.

Position information acquisition module can be obtained described position information of user's terminal from the setup requests that receives, also can take the family terminal positional information by reed from home subscriber server (HSS) or Gateway Mobile Location Center position information management entities such as (GLMC).Here said position information of user's terminal comprises the positional information of call subscriber terminal at least.

If position information acquisition module is arranged in routing redirection functional entity or the changed course/adaption function entity, according to the CAMEL agreement, in the IDP message of the routing redirection functional entity of VMSC in sending to visited network, carry Called Party Number, calling subscriber position district cell ID, the routing redirection functional entity can be preserved the Cell ID that receives, and distributes IMRN; CS adaption function entity in the visited network is by mutual with the routing redirection functional entity, and the IMRN that utilizes the routing redirection functional entity to distribute obtains the calling subscriber position district cell ID corresponding with this IMRN;

If position information acquisition module is arranged in the adaptive entity of CS or the changed course/adaption function entity, after the routing redirection functional entity receives IDP message, the Called PartyNumber and the calling subscriber position district cell ID that carry in the IDP message that receives are sent to CS adaption function entity, and request CS adaption function entity distributes IMRN; CS adaption function entity is preserved CalledParty Number and the calling subscriber position district cell ID that carries in the IDP message, distribute and corresponding with the Called PartyNumber of this preservation and calling subscriber position district cell ID promptly to call out corresponding IMRN, and the IMRN of distribution is returned to the changed course functional entity with this;

If position information acquisition module is arranged in the routing redirection functional entity or the adaptive entity of CS in or changed course/adaption function entity or be an independent community, can directly inquire about, to obtain position information of user's terminal to position servers such as HSS or GMLC.If inquire about to HSS, then by the user data requests on the Sh interface (User Data Request) information query, if there is position information of user's terminal among the HSS, then directly return, if there is no, then can be further to the location server inquiry, such as inquiring about to VMSC or SGSN by any time inquiry (ATI, Any Time Interrogation) message etc.Need to prove that what emphasize is a kind of means of obtaining position information of user's terminal by position information acquisition module of the present invention here, specifically how to obtain and belong to prior art, repeat no more here.

If position information acquisition module is arranged among the MGCF, after the setup requests of MGCF reception from user terminal, if carry calling subscriber position district cell ID in this setup requests, then with the positional information of this calling subscriber position district cell ID as the calling subscriber; If do not carry calling subscriber position district cell ID in this setup requests, then MGCF can obtain the positional information of this user terminal from location server the IMS territory or home subscriber server, and as calling subscriber's positional information.

Step 301: described position information acquisition module is carried at the position information of user's terminal that obtains in the Session initiation Protocol SIP signaling, sends to IP Multimedia System IMS territory.

In the subsequent voice calls in IMS territory, the IMS territory can utilize the positional information of the call subscriber terminal of acquisition to carry out business control in the IMS territory, such as the positional information of the basic service AS in the IMS territory according to this calling subscriber, whether the satisfied signatory beginning is exhaled limit service etc. to judge the user terminal that makes a call.

The inventive method is obtained the positional information of call subscriber terminal by the position information acquisition module that sets in advance, and calling subscriber's positional information passed to related entities in the IMS territory, further realized positional information according to this user terminal, to rationally controlling, improved quality of service control in IMS territory subsequent voice calls.

Making a call to the IMS territory in the CS territory with the user below is example to specifically describe the realization of the inventive method in conjunction with the embodiments, and Fig. 4 is the flow chart of the embodiment of the invention one, and specific implementation may further comprise the steps:

Step 400:UE sends call setup message in the CS territory to VMSC.

Carrying called number in this call setup message is Called Party Number, and user's present position-region cell ID.

After step 401:VMSC receives call setup message, trigger the IDP information and sending and give the routing redirection functional entity.

According to the CAMEL agreement, in IDP message, should carry the Cell ID of Called Party Number, calling subscriber position.

Above-mentioned steps 400～step 401 is in full accord with the specific implementation of prior art.

Step 402～step 403: the routing redirection functional entity is preserved the CellID receive, is distributed the IMRN corresponding with this Cell ID, and the IMRN that distributes is carried in the CONNECT message returns to VMSC, thereby call re-direction is arrived the IMS territory;

Step 404:VMSC is carried at IMRN and the Called Party Number that receives among the IAM, and sends to IMS territory MGCF entity.

In this step, VMSC has routed the call to IMS realm entry gateway according to the IMRN that receives.

Step 405:MGCF entity structure SIP:INVITE message is carried at IMRN and the CalledParty Number that receives in this INVITE, and sends to the inlet I-CSCF entity that the called subscriber belongs to the IMS territory.

At this moment, the IMRN that carries in the INVITE is used as called address.

After step 406:I-CSCF entity was received INVITE, detecting called address was IMRN, and this IMRN as a PSI, and is routed to CS adaption function entity with this INVITE.

Step 407～step 408:CS adaption function entity utilizes between IMRN and the routing redirection entity mutual, to obtain calling subscriber's present position-region cell ID.

CS adaption function entity is carried at the IMRN that receives in inquiry (QUERY) message, and send to the routing redirection functional entity, the routing redirection functional entity is carried at the CellID of this IMRN correspondence in response (RESPONSE) message, returns to CS adaption function entity.

Step 409:CS adaption function entity is the IMRN in the Called Party Number substitute I NVITE message that receives, and the Cell ID that obtains is carried in the SIP:INVITE message, replaces UE to initiate new session in the IMS territory to the S-CSCF entity.

CS adaption function entity can use existing P-Access-Network-Info header field or other certain header field in this SIP:INVITE message to carry Cell ID.In addition, in order to distinguish over the session of starting of common IMS territory, CS adaption function entity can also carry CS territory originating call sign by the existing P in this SIP:INVITE message-Visited-Network-ID header field or other certain header field, start from the CS territory to identify this calling, IMS territory operation controlling entity can be trusted above-mentioned positional information like this.

Step 410～step 411:S-CSCF entity is triggered to application server such as basic service AS under the user with calling, and the INVITE that receives sent to this basic service AS, carry out calling service control, basic service AS returns to the S-CSCF entity with INVITE after finishing calling service control.

In this step, after basic service AS receives INVITE, the calling subscriber's present position-region cell ID that carries according to the P-Access-Network-Info header field in this INVITE, know the user position, and know called homing position, thereby can begin to exhale limit service control according to Called Party Number.

If need not to begin to exhale traffic limits, basic service AS to finish after the calling service control, session returned to the S-CSCF entity; The traffic limits that begins if desired to exhale is then returned the refusal response.

Step 412:S-CSCF entity will be talked about and be routed to the callee side network, or sends refusal information to caller.

In this step, in SIP:INVITE message, carry Called Party Number.

And can be with calling subscriber's present position-region cell ID deletion of in step 409, carrying.Need to prove whether delete calling subscriber's present position-region cell ID and decided in its sole discretion by operator, deletion is in order not allow other carrier network obtain caller location information.

From embodiment one as seen, CS adaption function entity in the visited network is by mutual with the routing redirection functional entity, the IMRN that utilizes the routing redirection functional entity to distribute obtains the Cell ID of the calling subscriber position corresponding with this IMRN, and replacement UE, the Called Party Number and the Cell ID that obtain are carried in the SIP:INVITE message, initiate session to the called subscriber in the IMS territory in the IMS territory.And in the calling in follow-up IMS territory, basic service AS is according to the calling subscriber's present position-region cell ID that carries in this INVITE, know the user position, and know called homing position according to Called Party Number, thereby make the IMS territory according to calling subscriber's signatory situation, correctly realized subsequent voice calls control.

Fig. 5 is the flow chart of the embodiment of the invention two, and specific implementation may further comprise the steps:

Step 500:UE sends call setup message in the CS territory to VMSC.

After step 501:VMSC receives call setup message, trigger the IDP information and sending and give the routing redirection functional entity.

In cdma network, above-mentioned IDP message is source beginning request (ORREQ, OriginationRequest) message.

Above-mentioned steps 500～step 501 is in full accord with the specific implementation of prior art.

Step 502: the routing redirection functional entity is to CS adaption function entity application IMRN.

The routing redirection functional entity is carried at the Called Party Number that receives and the CellID of calling subscriber position in the QUERY message, sends to CS adaption function entity.

Step 503:CS adaption function entity distributes IMRN, the Called PartyNumber that preservation receives and the Cell ID of calling subscriber position.

The IMRN of this distribution is corresponding with the Called Party Number of preservation and the Cell ID of calling subscriber position.

Step 504:CS adaption function entity is carried at IMRN and returns to the routing redirection functional entity in the RESPONSE message.

Step 505: the routing redirection functional entity returns to VMSC with the IMRN that receives, thereby call re-direction is arrived the IMS territory.

Step 506:VMSC is carried at the IMRN that receives among the IAM, and sends to IMS territory MGCF entity, and VMSC has routed the call to IMS realm entry gateway according to the IMRN that receives.

Step 507:MGCF entity structure SIP:INVITE message is carried at the IMRN that receives in this INVITE, and sends to the inlet I-CSCF entity that the called subscriber belongs to the IMS territory.

At this moment, the IMRN that carries in the INVITE is used as called address.

After step 508:I-CSCF entity was received INVITE, detecting called address was IMRN, and this IMRN as a PSI, and is routed to CS adaption function entity with this INVITE.

The IMRN that the utilization of step 509:CS adaption function entity receives, the Called Party Number that will be corresponding with this IMRN and the Cell ID of calling subscriber position are carried in this INVITE, and IMRN is replaced by Called Party Number, replace UE to initiate new session to the S-CSCF entity in the IMS territory.

Equally, CS adaption function entity can use existing P-Access-Network-Info header field or other certain header field in this SIP:INVITE message to carry Cell ID.In addition, in order to distinguish over the session of starting of common IMS territory, CS adaption function entity can also carry CS territory originating call sign by the existing P in this SIP:INVITE message-Visited-Network-ID header field or other certain header field, starts from the CS territory to identify this calling.

Step 510～step 511:S-CSCF entity is triggered to basic service AS under the user with calling, and the INVITE that receives sent to this basic service AS, carry out calling service control, basic service AS returns to the S-CSCF entity with INVITE after finishing calling service control.

In this step, after basic service AS receives INVITE, the calling subscriber's present position-region cell ID that carries according to the P-Access-Network-Info header field in this INVITE, know the user position, and know called homing position according to Called Party Number, thereby can begin to exhale limit service control, whether carry the credibility sign of positional information in existing P-Visited-Network-ID header field that can also be in this INVITE or other certain header field, it is credible to be used for identifying calling subscriber's present position-region cell ID that this INVITE carries.

Step 512:S-CSCF entity will be talked about and be routed to the callee side network, or sends refusal information to caller.

In this step, in SIP:INVITE message, carry Called Party Number.

And can be with calling subscriber's present position-region cell ID deletion of carrying in the SIP:INVITE message.Need to prove whether delete calling subscriber's present position-region cell ID and decided in its sole discretion by operator, deletion is in order not allow other carrier network obtain caller location information.。

From embodiment two as seen, CS adaption function entity in the visited network receives the request from the changed course functional entity, preserve the Called Party Number and the calling subscriber position district cell ID that carry in the request, and distribute and the Called Party Number and the corresponding IMRN of calling subscriber position district cell ID that preserve; CS adaption function entity is carried at Called Party Number and the Cell ID that obtains in the SIP:INVITE message, replaces UE to initiate session in the IMS territory in the IMS territory to the called subscriber.And in the calling in follow-up IMS territory, basic service AS is according to the calling subscriber's present position-region cell ID that carries in this INVITE, know the user position, and know called homing position according to Called Party Number, thereby make the IMS territory according to calling subscriber's signatory situation, correctly realized subsequent voice calls control.

In addition, when the user calls out in the territory is initiated in the IMS territory or registers, processing method of the present invention is: the positional information of self may be carried in the P-Access-Network-Info header field in SIP session/register requirement that user terminal is initiated, position information acquisition module in being arranged on the IMS network among certain entity such as P-CSCF or certain AS, after receiving this SIP session/register requirement, the inquiring position server obtains user's actual position information; Then the actual position information that obtains is carried in this SIP session/register requirement, can be with the content in the actual position information replacement P-Access-Network-Info header field that obtains, also can use another one header field or parameter to carry the actual position information of acquisition; Afterwards, the SIP signaling is continued to pass to next entity in the IMS territory.Like this, the follow-up entity in IMS territory can obtain this user's actual position information and utilize this user's actual position information to carry out business control from the SIP signaling, and said business can be the beginning to exhale limit service, or the roaming limit service, or other business.

The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. method of transmitting position information of user's terminal in IP Multimedia System IMS is characterized in that be provided for obtaining the position information acquisition module of position information of user's terminal in the IMS territory, this method comprises:

2. method according to claim 1 is characterized in that, the described method of obtaining position information of user's terminal is: obtain from the signaling that receives, or obtain from location server or home subscriber server.

3. method according to claim 1 is characterized in that, this method specifically may further comprise the steps:

4. method according to claim 3 is characterized in that, described position information acquisition module is arranged in the routing redirection functional entity, and described steps A specifically comprises:

5. method according to claim 4 is characterized in that, described step B specifically comprises:

6. method according to claim 3 is characterized in that, described position information acquisition module is arranged in the CS adaption function entity, and described steps A specifically comprises:

7. method according to claim 6 is characterized in that, described step B specifically comprises:

8. method according to claim 1 is characterized in that, described position information acquisition module is arranged among the MGCF MGCF of IMS territory, and described steps A specifically comprises:

9. method according to claim 1 is characterized in that, this method specifically may further comprise the steps:

10. according to claim 5,7 or 9 described methods, it is characterized in that this method also comprises:

11. method according to claim 10 is characterized in that, described business is exhaled limit service for the beginning, or the roaming limit service, or other business.

12., it is characterized in that described user position information is a user position district cell ID according to each described method of claim 1～9.

13., it is characterized in that described user position information is carried in the P-Access-Network-Info header field or other header field of described SIP session/login request message according to each described method of claim 1～9.

14. method according to claim 13 is characterized in that, in the existing P-Visited-Network-ID header field or other header field of described SIP conversation request message, further carries:

15., it is characterized in that described routing redirection functional entity and CS adaption function entity are independent community according to claim 4 or 6 described methods, or be arranged in the same entity also respectively as two functional modules.

16. device that in IP Multimedia System IMS, transmits position information of user's terminal, it is characterized in that, this device comprises at least: position information acquisition module, this position information acquisition module receives position information of user's terminal, and this position information of user's terminal is carried in the Session initiation Protocol SIP signaling, send to IP Multimedia System IMS network by the existing SIP signaling interface module in this device.

17. device according to claim 16 is characterized in that, described device is the routing redirection functional entity, and described position information acquisition module is arranged on the routing redirection functional entity;

Perhaps, described device is an independent community.

18. device according to claim 17 is characterized in that, entity relevant with registration or calling in the described IMS territory comprises: application server or MGCF or P-CSCF.